EP0008971A1 - Mehrschichtiges Klebematerial und Verfahren zu seiner Verwendung - Google Patents

Mehrschichtiges Klebematerial und Verfahren zu seiner Verwendung Download PDF

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Publication number
EP0008971A1
EP0008971A1 EP79400569A EP79400569A EP0008971A1 EP 0008971 A1 EP0008971 A1 EP 0008971A1 EP 79400569 A EP79400569 A EP 79400569A EP 79400569 A EP79400569 A EP 79400569A EP 0008971 A1 EP0008971 A1 EP 0008971A1
Authority
EP
European Patent Office
Prior art keywords
composite sheet
sheet according
support
covering
coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP79400569A
Other languages
English (en)
French (fr)
Inventor
François Lefevre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adhesifs De Bellegarde-Ain (saba) SA Ste
Original Assignee
Adhesifs De Bellegarde-Ain (saba) SA Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR7824504A external-priority patent/FR2434442A1/fr
Priority claimed from FR7917775A external-priority patent/FR2461314A2/fr
Application filed by Adhesifs De Bellegarde-Ain (saba) SA Ste filed Critical Adhesifs De Bellegarde-Ain (saba) SA Ste
Publication of EP0008971A1 publication Critical patent/EP0008971A1/de
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers

Definitions

  • the self-adhesive composite sheets are used either to make self-adhesive materials or objects with a flat face and / or to laminate between them materials with a flat face not intended to undergo deformation, or else to affix a decorative sheet formed by the composite sheet itself.
  • they include a paper or textile or plastic support, two layers of pressure-sensitive adhesive covering the two sides of the support and a removable protector usually silicone on both sides.
  • they comprise a paper, textile or plastic support, which constitutes the decorative sheet in itself, one face of said support being provided with the decorative pattern while the other face is coated with a layer of self-adhesive adhesive.
  • a removable protector usually silicone, is applied to the side coated with the pressure-sensitive adhesive.
  • Such self-adhesive composite sheets cannot withstand major deformations without breaking. In particular, they cannot be used to cover already formed parts, such as accessories used in the construction of motor vehicles which, in general, for aesthetic reasons, are covered with a covering material.
  • the part itself is first manufactured by any suitable technique, for example by vacuum thermoforming or molding.
  • a liquid adhesive is applied to one of its faces, a plate of suitable covering material is placed on the already formed part and a new thermoforming operation is carried out.
  • the use of these adhesives liquids have drawbacks, in particular with regard to the shelf life of glues, soiling, pollution, evaporation of the solvents used in connection with glues, the very large workforce required the implementation of this technique.
  • the invention proposes to extend the field of application of the self-adhesive composite sheets and it is characterized by the fact that it provides for the application of deformable elements as constituents of such a composite sheet.
  • a glue or adhesive support of a flexible film plastic sheet such as polyethylene or polypropylene, or polyvinyl chloride or any other material capable of withstanding significant deformations without breaking .
  • the film is continuous, with or without perforations.
  • the plastic material is used in the form of wires or grids obtained by any process.
  • the invention provides for the application, as a glue or adhesive support, of the gauze threads of synthetic material used in the medical or hygienic field.
  • thermoforming constituents are applied to enter the composition of a composite sheet.
  • the composite sheet according to the invention is then well suited for making the complex surfaces of objects obtained by hot forming adhesive.
  • the composite sheet is provided for assembling different materials intended for the manufacture of parts by thermoforming.
  • the invention relates to embodiments in which the adhesiveness of the sheet is imparted by a pressure-sensitive adhesive.
  • the adhesiveness is imparted by a fusible component, such as a varnish, the adhesiveness property of which is developed during thermoforming.
  • the invention finds a particularly advantageous use here in the field of manufacturing accessories used in the construction of motor vehicles, especially to cover these accessories (dashboards, interior door trim, etc.).
  • a composite sheet according to the invention With a composite sheet according to the invention, the two faces of which are coated with a fusible varnish, such parts can be produced in a single phase.
  • a film with extensional deformability properties is applied successively to a plate intended to constitute after forming the desired part, each of the faces of which is covered with a fusible varnish and then, onto the plate thus coated, a sheet in a suitable material to constitute the covering of the room.
  • the assembly is then thermoformed and, during this operation, the varnish on each face of the film achieves the final adhesion of the covering sheet to the plate constituting the part.
  • a sheet is used, the support of which is made of a plastic material having a property of deformability when extended, intended to be used as a covering material, this sheet having one of its faces coated with a fusible varnish.
  • a covering sheet thermoforming operation is carried out on a plastic part already in its final form.
  • a composite sheet according to the invention comprises a deformable support S (FIG. 1) coated on one side with a first layer of deformable adhesive A 1 and on the other side with a second layer of deformable adhesive A 2 .
  • the adhesive layer A 1 is covered by a first protective coating P 1 .
  • the adhesive layer A 2 can be covered by a second protective coating P 2 .
  • Deformability is understood to mean the property by which the support S, the layers of adhesives A 1 and A 2 and the protector P 1 will not be torn when the sheet is shaped to conform to the surface of the object that it is intended to coat.
  • constituent materials of support S there are: polyethylene, polypropylene, polyvinyl chloride, polycarbonate, polyamide, etc.
  • the support S can be a sheet or a continuous film.
  • the support is perforated according to small holes, which allows the air trapped during the lamination with other waterproof materials to escape.
  • wires or grids obtained by an adequate manufacturing process, as shown in FIG. 2.
  • Non-limiting examples of the material constituting such wires or grids are: polypropylene, polyethylene, etc.
  • adhesives constituting layer A and layer A 2 we cite: polyacrylics, natural and synthetic elastomers, thermoplastic polymers, silicone polymers, etc.
  • materials suitable for constituting a protective coating there are: polyethylene, polypropylene, polyamide, polyester, polycarbonate, paper, etc.
  • the composite sheet S When, as is frequent, the composite sheet S is sold in the form of a roll, it is a silicone interlayer on one and the other of its faces which plays the role of the two protective coatings P l and P 2 .
  • the user After having unrolled the necessary sheet length, the user directly has a sheet of which one side is adhesive or becomes adhesive, while the other adhesive side is coated with the protector allowing its manipulation.
  • thermoformable materials such as textiles impregnated with resins, textiles laminated with sheets of thermoformable material, sheets of thermoformable material (as nonlimiting examples: polypropylene, ABS (acrylonitrile butadiene copolymer). and styrene), polyvinyl foam, etc.).
  • the constituents of the sheet are then chosen according to their thermoformability.
  • Figures 3 and 4 schematically show an example of the use of such a sheet.
  • a sheet or plate M made of ABS or thermoformable textile is laminated to a sheet or composite film according to the invention, such as that shown in FIG. 1, the protective coating P 2 of which has been removed to allow bonding.
  • the assembly previously cut to the appropriate dimensions ( Figure 3), is then placed in a mold. It is thermoformed either with a punch or the like or by using vacuum or pneumatic pressure.
  • An object 12 is obtained (FIG. 4) of which at least one face 13 has a quality of adhesiveness which will be used later.
  • layer A and / or layer A 2 are prior to forming or alternatively is developed by forming.
  • the object 12 can be stored and handled until the moment of its use due to the presence of the protective coating P 1 .
  • the protective coating P 1 is removed.
  • a composite sheet according to the invention is bonded, by its adhesive layer A to a first plate PL 1 .
  • the protective coating P 2 having been removed, a second plate PL 2 is made integral with the plate PL 1 by bonding thanks to the layer of adhesive A 2 .
  • the whole is then thermoformed.
  • thermoforming takes place by action on the external face 14 of the plate PL l , the external face 15 of the plate PL 2 can be provided with an ornamental covering such as a velvet V.
  • the protective coatings P 1 or P 2 , or the silicone interlayer need not be made of a deformable material.
  • the composite sheet comprises a support 17 in a flexible film such as polyethylene or polypropylene, etc ... and is coated on both of its faces with a fusible varnish , respectively 16 and 18.
  • a flexible film such as polyethylene or polypropylene, etc ...
  • a fusible varnish respectively 16 and 18.
  • the composite sheet comprises an insert 19 suitable for being shaped, advantageously thermoformed, without the appearance of tears or weakening zones, such an insert being chosen from the group consisting of polyethylene, polypropylene, polyamide, polycarbonate, etc ... and on one side 21 of which is present a silicone varnish while the other side 22, also silicone, or varnished to be non-stick, receives a layer of glue 23.
  • an insert being chosen from the group consisting of polyethylene, polypropylene, polyamide, polycarbonate, etc ... and on one side 21 of which is present a silicone varnish while the other side 22, also silicone, or varnished to be non-stick, receives a layer of glue 23.
  • the invention -provides a composite sheet F ( Figure 8) made of a deformable material intended to constitute the covering of a plastic part.
  • a composite sheet F ( Figure 8) made of a deformable material intended to constitute the covering of a plastic part.
  • One of its faces is coated with an adhesive layer A in a fusible varnish, that is to say a varnish whose adhesiveness develops under heat.
  • the other face namely that intended to constitute the external face of the part once dressed, is uncoated.
  • covering materials constituting the sheet F there are: expanded polyvinyl chloride (PVC), grained, flocked PVC, textile on PVC film, etc.
  • fusible varnishes there are: varnishes based on polyvinyl, polyacrylic, polyolefin, polyamide, etc. resins.
  • Such a sheet is advantageously used to cover an object made of plastic, for example an automobile car accessory such as dashboard, interior door panel, etc.
  • an object made of plastic for example an automobile car accessory such as dashboard, interior door panel, etc.
  • A.B.S. copolymer of acrylonitrile butadiene and styrene
  • NORYL polyphenylene oxide resin
  • PVC polyvinyl chloride
  • WOODSTOCK polyvinyl chloride
  • CARENE polyethylene powder
  • a part P already having the required shape as obtained by any suitable process, for example by molding, forming, etc., and depositing a sheet F according to the invention on the face to be dressed of this part with its layer of adhesive A facing the part (FIG. 9).
  • a thermoforming operation of the covering sheet on the part and, by this operation, the varnish constituting the adhesive layer A is activated and makes the sheet adhere to the part.
  • a object 25 one face 26 of which, intended to be transparent, is coated with the desired covering material (FIG. 11).
  • a plate P ′ of thermoformable plastic material (FIG. 10) is placed, for example in ABS, a sheet F according to the invention in the desired covering material, the sheet F being placed on the plate P with its layer of adhesive A facing said plate.
  • the assembly previously cut to the appropriate dimensions, is then placed in a mold of the part to be manufactured. It is thermoformed, either using a punch or the like, or using vacuum or pneumatic pressure.
  • An object 25 is obtained, the face 26 of which, intended to be visible, is coated with the desired covering material (FIG. 11).
  • the fusible varnish constituting the adhesive A is formulated so that it is compatible on the one hand with the material constituting the covering sheet and, on the other hand, with the material constituting the part.
  • the fusible varnish is advantageously a polyvinyl varnish.
  • the invention here is particularly advantageous in that it provides a covering material itself provided with a suitable fusible varnish, which covering can be used directly by the manufacturers of automobile accessories.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
EP79400569A 1978-08-23 1979-08-13 Mehrschichtiges Klebematerial und Verfahren zu seiner Verwendung Ceased EP0008971A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7824504A FR2434442A1 (fr) 1978-08-23 1978-08-23 Feuille composite autocollante et/ou reactivable et dispositif comportant une telle feuille
FR7824504 1978-08-23
FR7917775 1979-07-09
FR7917775A FR2461314A2 (fr) 1979-07-09 1979-07-09 Feuille composite adhesive et son procede d'utilisation

Publications (1)

Publication Number Publication Date
EP0008971A1 true EP0008971A1 (de) 1980-03-19

Family

ID=26220732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400569A Ceased EP0008971A1 (de) 1978-08-23 1979-08-13 Mehrschichtiges Klebematerial und Verfahren zu seiner Verwendung

Country Status (1)

Country Link
EP (1) EP0008971A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069403A (en) * 1985-05-31 1991-12-03 Minnesota Mining And Manufacturing Company Drag reduction article

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372049A (en) * 1961-10-09 1968-03-05 Minnesota Mining & Mfg Polyolefin film composition, film, and pressure-sensitive adhesive sheet material
DE2709800A1 (de) * 1977-02-16 1978-08-17 Guenter Schwarz Mehrschichtiges klebematerial und verfahren zu seiner anwendung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372049A (en) * 1961-10-09 1968-03-05 Minnesota Mining & Mfg Polyolefin film composition, film, and pressure-sensitive adhesive sheet material
DE2709800A1 (de) * 1977-02-16 1978-08-17 Guenter Schwarz Mehrschichtiges klebematerial und verfahren zu seiner anwendung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069403A (en) * 1985-05-31 1991-12-03 Minnesota Mining And Manufacturing Company Drag reduction article

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19840204

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Inventor name: LEFEVRE, FRANCOIS